SU1837945A3 - Process for waste gas desulfuration - Google Patents

Process for waste gas desulfuration Download PDF

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Publication number
SU1837945A3
SU1837945A3 SU884356641A SU4356641A SU1837945A3 SU 1837945 A3 SU1837945 A3 SU 1837945A3 SU 884356641 A SU884356641 A SU 884356641A SU 4356641 A SU4356641 A SU 4356641A SU 1837945 A3 SU1837945 A3 SU 1837945A3
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SU
USSR - Soviet Union
Prior art keywords
gas
bacteria
reactor
branch
liquid medium
Prior art date
Application number
SU884356641A
Other languages
Russian (ru)
Inventor
Berzatsi Lyudvig
Etsenberger Valter
Kloimshtajn Lotar
Nidermajer Ervin
Shmidt Alfred
Vitdshperger Andreas
Original Assignee
Vaagner Biro Ag
Glantsshtoff Austria Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to AT0275287A priority Critical patent/AT388313B/en
Application filed by Vaagner Biro Ag, Glantsshtoff Austria Ag filed Critical Vaagner Biro Ag
Application granted granted Critical
Publication of SU1837945A3 publication Critical patent/SU1837945A3/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3539730&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SU1837945(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84Biological processes
    • Y02A50/2358

Description

The invention relates to a microbiological method for the conversion of sulfur-containing harmful substances in waste basics, mainly H 2 S, CS 2 and / or 3OS, as well as thioalcohols, thioethers, thiofeev into diluted acids and their removal, in estonia, in particular from waste gases of synthetic production fiber.
As you know, air contaminated with the above harmful substances is eliminated by using it as combustion air in steam generators or as an aeration tool in wastewater treatment plants. Since the need for an amount of oxygen has two boundaries and in a large number of cases it is necessary to remove contaminated air or gas in significantly large quantities, the removal of these foul-smelling exhaust gases with a relatively low concentration of harmful gas remains an unresolved problem.
In addition, an adsorption method is known for separating from gases the viscose production of H 2 S and CS 2 gas. For example, H 2 S gas can be adsorbed using KJ-impregnated coarse activated carbon, and CS 2 can be adsorbed with fine-pored activated carbon. The regeneration of the absorbed activated carbon is carried out with liquid CS 2 , H 2 SO4 is washed with water, and CS 2 is stripped with water vapor.
According to another oxidation method
H 2 S is used heavy metal-poor coal. H2SO4 formed in a small amount is neutralized with
NH 3 .
СО со ^ 4 Ол> со
When both methods are implemented, the methods of H 2 S oxidation and CS2 adsorption can be carried out in one, and at a higher concentration in two separate adsorbers.
It is also known to use combined methods consisting of alkaline washing to remove H2S and adsorb CS2 activated carbon.
Also, these combined methods may not be suitable for the purification of large quantities of exhaust gases having a low concentration of harmful gases.
The basis of the invention is the neutralization of the above harmful components contained in the exhaust gases also in small concentrations, as well as to convert the resulting compounds either into a marketable product or a product suitable for use, or at least to a large extent to neutralize these compounds.
The invention is characterized in that the exhaust gas is passed through a reactor with filler elements, the latter being always moistened and covered with immobilized microorganisms from the thiobaclIlaceae family, for example, predominantly thlobaccillus thlooxidans. A liquid dripping from filling elements containing harmful substances oxidized by microorganisms, which are predominantly acidic sulfur compounds, is neutralized. At the same time, oxidized harmful substances are converted into salts, which are partially removed, and the loss of volume is supplemented with pure water. Residual water remains with dissolved salts in the system.
In more detail, the subject matter of the invention is described below using an example of its implementation, illustrated in schematic form by a drawing.
In the manufacture of staple fiber, foam glass, cellulose sausage casings, and an endless filament yarn, approximately 50,000 to 700,000 cubic meters of waste gas are produced per ton of product, which, depending on the technology stage, contains different concentrations of H2S, CS2 and / or COS gases (high-calorie gas stream , low calorific gas flow). High-calorific gases can be used in general for cost-effective extraction of sulfur components from it. As for low-calorie gases, they, in any case, are associated with the problem of eliminating unpleasant odors. These gases contain predominantly up to 3000 ppm CS2. 1000 ppm H2S and / or COS. Part of this off-gas is purified in an experimental reactor with a diameter of 30 cm and a useful volume of 115 liters. This reactor is filled with filling elements containing microorganisms from the sewage sludge of the working treatment facilities. Microorganisms are mainly bacteria of the thlobacillaceae family. Bacteria were immobilized in the filling elements after about a week of adaptation. The waste gas to be cleaned is passed through the reactor from the bottom up, and in the countercurrent it is pumped with water in an amount of 20 to 100 liters per hour to discharge the resulting metabolic products, which is in constant circulation, and before introducing this water into the reactor during continuous operation, the pH value is adjusted , which is set equal to from 3 to 10. With the passage of water through the column, the pH value decreases in the examples below by about 1 to 5 units. To divert the resulting metabolic products from the circulation, about 1 liter of liquid per hour is removed, which is filled with fresh water. The formed sulfate can be precipitated from the removed stream with lime water, and in this case, partial regeneration of the alkali used in neutralization takes place. In order to satisfy the need of microorganisms for trace elements and inorganic substances, such as phosphorus and nitrogen, appropriate solutions of nutrients or salts of trace elements that are used in the cultivation of thiobacillaceae are added to fresh water. The conversion of sulfur-containing components of the exhaust gases when using bacteria occurs according to the following equations:
H 2 S + 202 ----> H 2 SO4
CS2 + 402 + 2H 2 O -> 2H 2 SO4 + СО 2 cos + 2О 2 + н 2 о -> H 2 SO4 + co 2 :
• In the table. 1 and 2 indicate the separation of H 2 S or CS 2 depending on the amount of gas missed.
The metabolic products leaving the reactor are neutralized by <alkali addition (sodium or potassium liquor), due to which mainly soluble salts are formed which are in circulation. To prevent an increase in the concentration of salts in the circulating liquid, as part of the increase in ions in the reactor, an appropriate amount of salt solution is withdrawn from the neutralized tank, and this
Liquids are filled with fresh water, since sodium hydroxide and / or potassium hydroxide are relatively expensive, some of them can be generated by adding lime ode according to, for example, the following equation:
I. Na 2 SO4 + Ca (OH) g— ”2NaOH + CaSCH
I CaSO4 precipitates or can be thickened, while the supernatant is poor in sulfate and therefore can be diverted through a biological treatment plant or returned to the internal circulation.
The proposed method is illustrated in the drawing.
In chemical plant 1, which produces staple fiber, foam glass, cellulose sausage casings or an endless filament, there is also a waste liquid, which is treated in a biological treatment plant 2. Along with the exhaust gas, 2. Clean water if it cannot be used for internal circulation , divert to a water intake 3. In a biological treatment plant, sulfur bacteria are formed that are immobilized on the filling elements that enter the trade. These filling elements are placed in reactor 4 and moistened constantly there, for which, of course, clean water rich in nutrients and sulfur bacteria of a biological treatment plant 2 is especially suitable. Through the reactor, in countercurrent to the liquid, the off-gas generated at chemical plant 1 , directed according to the pipeline 5 to the moisturizing liquid of the filling elements and passed through the layer of the filling element, and the bacteria bind the sulfur-containing parts of the exhaust gas and form as The metabolic product is sulfuric acid, which is dissolved in a dripping liquid and collected in the sewage pit 6 of reactor 4. This acid solution in another reactor 7 is mixed with alkali, in particular sodium hydroxide or potassium hydroxide, as a result of which salt is formed, which is sent to the third reactor 8, in which soluble salts are added by the addition of milk of lime mainly to insoluble chrysalis removed from the process for storage in 9 or for further use. The sulfate-poor supernatant can be sent through a biological treatment plant to a water inlet 3. The liquid in reactor 8 is mainly dissolved sodium hydroxide or dissolved potassium hydroxide, which is returned to reactor 7 to prevent loss of chemicals. The separation of both reactors 7 and 8 is mainly done in order to ensure the concentration of the solution and to separate the bacteriological circulation from the gypsum circulation, so that the formation of crystals is deliberately excluded in the reactor 7.

Claims (1)

  1. Claim
    The method of purification of exhaust gases from sulfur-containing compounds, including exposure to a gas stream of sulfide-oxidizing bacteria of the ThlobaclIlaceae family in a liquid medium at 15 - 30 ° С followed by separation of sulfates, characterized in that bacteria are used that are immobilized on filling bodies located in the reactor, the process is carried out passing a gas stream and a liquid medium through filling bodies with bacteria immobilized by bacteria in countercurrent flow, then the liquid medium with sulfates dissolved in it is made alkaline with NaOH or KOH and added added to it calcium oxide to precipitate insoluble calcium sulphates.
    Table!
    Branch H 2 S
    Gas flow, m d / h End, uncleaned. gas End, purified gas Branch 10 20 Not detected 100 fifteen 20 100 20 20 Traces 100 thirty 20 1 95 40 20 ; 4 80
    Ί
    table 2
    CS2 Branch
    Gas flow, m 3 / h End, raw gas' End, purified gas Branch 10 80 Not detected 100 • fifteen 90 7 92 20 90 8 91 thirty 80 19 78 40 80 42 42
    IN
SU884356641A 1987-10-19 1988-10-18 Process for waste gas desulfuration SU1837945A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT0275287A AT388313B (en) 1987-10-19 1987-10-19 Method for the microbiological conversion of sulfurized pollutants in exhaust gas

Publications (1)

Publication Number Publication Date
SU1837945A3 true SU1837945A3 (en) 1993-08-30

Family

ID=3539730

Family Applications (1)

Application Number Title Priority Date Filing Date
SU884356641A SU1837945A3 (en) 1987-10-19 1988-10-18 Process for waste gas desulfuration

Country Status (16)

Country Link
US (1) US4968622A (en)
EP (1) EP0312958B1 (en)
JP (1) JPH01231925A (en)
CN (1) CN1013735B (en)
AT (1) AT388313B (en)
BG (1) BG51254A3 (en)
BR (1) BR8805663A (en)
CA (1) CA1302930C (en)
CS (1) CS277304B6 (en)
DD (1) DD275621A5 (en)
DE (1) DE3880425D1 (en)
ES (1) ES2040809T3 (en)
HU (1) HU202770B (en)
PL (1) PL158304B1 (en)
PT (1) PT88794B (en)
SU (1) SU1837945A3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015065239A1 (en) * 2013-10-29 2015-05-07 Игорь Анатольевич МНУШКИН Multi-tonnage production for processing natural gases from various deposits
RU2685099C1 (en) * 2018-11-06 2019-04-16 Игорь Анатольевич Мнушкин Production cluster

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FR2655563B1 (en) * 1989-12-12 1993-10-08 Saps Anti Corrosion Process for the bioepuration of gaseous effluents loaded with pollutant products and more particularly with sulfur products.
DE4027220A1 (en) * 1990-08-24 1992-02-27 Preussag Noell Wassertech Biological breakdown of hydrogen sulphide in gas
DE4027126C1 (en) * 1990-08-28 1991-12-12 Eberhard Prof. Dr. 2000 Hamburg De Bock
GB2262457A (en) * 1991-12-20 1993-06-23 Wrc Process Engineering Limite Removing h2s from gas
US5236677A (en) * 1992-03-13 1993-08-17 Grupo Cydsa S.A. De C.V. Biological process for the elimination of sulphur compounds present in gas mixtures
WO1994009885A1 (en) * 1992-11-02 1994-05-11 Bbk Bio Air-Clean Aps Bio filter
AU1951895A (en) * 1994-03-16 1995-10-03 Vapo Oy Process and apparatus for the purification of gases
PT824366E (en) * 1995-05-10 2005-02-28 Bord Na Mona Treatment and effluent systems
US5686293A (en) * 1995-07-07 1997-11-11 Phillips Petroleum Company Sulfide-oxidizing bacteria
US5981266A (en) * 1996-05-20 1999-11-09 Gas Research Institute Microbial process for the mitigation of sulfur compounds from natural gas
US6013512A (en) * 1996-11-06 2000-01-11 Turschmid; Krzysztof H. Method for scrubbing gaseous emissions using bacteria
CN1089021C (en) * 1997-11-24 2002-08-14 中国石油化工集团公司 Method for purifying gases containing stench sulphureous gases
US6032613A (en) * 1998-03-26 2000-03-07 Teepak Investment, Inc. Biological treatment system for gaseous waste
WO2005030369A1 (en) * 2003-09-24 2005-04-07 Söll Gmbh Device for purifying exhaust gas or used air
US20080245232A1 (en) * 2007-04-09 2008-10-09 Thomas Getz Downflow Biofiltration of Hydrogen Sulfide-Containing Gas
TWI478762B (en) * 2012-09-19 2015-04-01 Univ Nat Chiao Tung System and method for reducing h2s contained in gas
CN103272473B (en) * 2013-05-29 2016-03-30 中国科学院生态环境研究中心 Water germ active filler and preparation method thereof
WO2016007416A1 (en) * 2014-07-07 2016-01-14 Geosyntec Consultants, Inc. Biogeochemical transformations of flue gas desulfurization waste using sulfur oxidizing bacteria
CN105709592A (en) * 2016-04-26 2016-06-29 杭州奥通环保科技股份有限公司 Biochemical treatment device of low-concentration waste gas of viscose fibers and treatment method
EP3466894B1 (en) 2017-10-05 2020-05-13 INDIAN OIL CORPORATION Ltd. Treatment and recovery of caustic from spent caustic through bioelectrochemical process

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015065239A1 (en) * 2013-10-29 2015-05-07 Игорь Анатольевич МНУШКИН Multi-tonnage production for processing natural gases from various deposits
RU2560406C2 (en) * 2013-10-29 2015-08-20 Игорь Анатольевич Мнушкин Natural gas conversion method
RU2685099C1 (en) * 2018-11-06 2019-04-16 Игорь Анатольевич Мнушкин Production cluster

Also Published As

Publication number Publication date
PL158304B1 (en) 1992-08-31
CA1302930C (en) 1992-06-09
PL275352A1 (en) 1989-06-12
DD275621A5 (en) 1990-01-31
BR8805663A (en) 1989-07-18
DE3880425D1 (en) 1993-05-27
EP0312958B1 (en) 1993-04-21
EP0312958A1 (en) 1989-04-26
ATA275287A (en) 1988-11-15
ES2040809T3 (en) 1993-11-01
BG51254A3 (en) 1993-03-15
CS687088A3 (en) 1992-08-12
US4968622A (en) 1990-11-06
HUT51172A (en) 1990-04-28
PT88794B (en) 1993-01-29
JPH01231925A (en) 1989-09-18
HU202770B (en) 1991-04-29
CN1039190A (en) 1990-01-31
AT388313B (en) 1989-06-12
CN1013735B (en) 1991-09-04
CS277304B6 (en) 1993-01-13

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